I got asked about the new firmware the other day (forgot on which forum/thread!), so here's the official word from Auralic...
They're setting up the service centers, where people and/or dealers will be able to ship the units for upgrade. The new firmware is version 2.0, and you can check if you have that by going on Menu > System > Next > About.
Will try to keep people posted as I learn more.
Alex